<!DOCTYPE html>
<html>
  <head>
    <meta charset="utf-8">
    <title></title>
    <script type="text/javascript">
      let str = '{"a": 12, "b": 5, "c":"test"}';
      let json = JSON.parse(str);

      console.log(json);

    </script>
  </head>
  <body>

  </body>
</html>
